Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number E251 14 found under Filter Element Fluid by Hengst Walter Ing Gmbh And Co. The National Stock Number assigned to this part is 2940121683695, and the Federal Supply Class is 2940 Engine Air And Oil Filters Strainers And Cleaners Nonaircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like E251 14.